var createError = require('http-errors')
var express = require('express')
var path = require('path')
var cookieParser = require('cookie-parser')
var logger = require('morgan')

var indexRouter = require('./routes/index')
// var usersRouter = require('./routes/users')
var userRouter = require('./routes/admin/userRouter')
const jwt = require('./utils/JWT.js')
const { log } = require('console')

var app = express()

// view engine setup
app.set('views', path.join(__dirname, 'views'))
app.set('view engine', 'jade')

app.use(logger('dev'))
app.use(express.json())
app.use(express.urlencoded({ extended: false }))
app.use(cookieParser())
app.use(express.static(path.join(__dirname, 'public')))

// 校验token的中间件
app.use((req, res, next) => {
  // 去login直接去
  if (req.url == '/admin/userRouter/login') {
    next()
    return
  } else {
    console.log(req.headers)
    const token = req.headers['authorization'].split(' ')[1]
    // 校验payLoad
    const payLoad = jwt.verify(token)
    // 如果有token并且token合法
    payLoad && setNewToken()
    // 设置新token
    function setNewToken() {
      const newToken = jwt.generator(
        {
          id: payLoad.id,
          userName: payLoad.userName,
        },
        '1d'
      )
      res.header('Authorization', newToken)
      next()
      return
    }
    // 若token不合法  payLoad == false
    !payLoad && res.status(401).send({ message: 'token过期' })
  }
})

app.use('/', indexRouter)
// app.use('/users', usersRouter)
app.use(userRouter)

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404))
})

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message
  res.locals.error = req.app.get('env') === 'development' ? err : {}

  // render the error page
  res.status(err.status || 500)
  res.render('error')
})

module.exports = app
